Typewriting machine



C. U. CARPENTER Dec. 8 TYPE-WRITING MACHINE 4 Sheets-Sheet 1 Filed Dec.

Dec. 8 1925- C. U. CARPENTER TYPEWRITING MACHINE Filed Dec. 1921 4 Sheets-Sheet 2 Dec. 8, 1925.

C. U. CARPENTER TYPEWRI'IING MACHINE F i1ed Dec. 1, 1921 4 Sheets-Sheet 5 C. U. CARPENTER Dec. 8, "W25- TYPEWRITING MACHINE Filed Dec. 1921' 4 SheetsShee 2 4 Patented Dec. 8, 1925.

EB STA-F Eis- PATENT QFF fQ-E- TY'PEWRI'DI'NG) MAEGHINE=- Application filed December 1,1921. Serifal No. 519,263.

chi1'1e's,-an l has t'or' its objeet theprovision of means whereby a eom'j'n'n-o usly a'eeeler nted movementiin )zn'ted to the type-em"- rymg element tlnouglioutthe printingstroke thereof; and further, the ltn-ovision'of novel inezr ns whereby the t -'e -g'iirryln ele-n-l'e nt is retraete'tl with an initially 'qulc tinovenient so its to qiuiekly clear the type-impressing space at the platen-between printingstrokes of successive type-om'rying elements having converging jrintingpaths;

It is the objeet of my invention turthe'iato proyicle novetnieuns whereby the printing stroke of a= type-liar is initiated with :rconiputatively slow 1110\"61110-11fi, and this movement continuously accelerated thmnghont the pio'g-ress ot' the printing stroke so that the printingimpact upon-the ribbon ls eft'e'ctetlwhen the tjqpe-bar has attained its greatest velocity and conseqiiently its greatest. force;- and tnrther to provide novel \rienns \vherelry a light touch of the finger :will iiiitiutethe n'inting stroke ofthe typehar and cause its aedeleration; the type-bin gathering momentum (luring the printing so-0i e,-- zintl' the inertia otmotion of the type-bar ztidintf in completing the printing strokeit is the object of my invention further to provide a novel typewriter of the portable type; to provide novel means in at typewriter of this type wl'ieieby excel-lent work is produced with little atom; wlieveby the printing is aceo'inplisheif by" novel means" employingfeiv parts which 'aie strong and durable and leadi-l-y assembled? and to pm? vic'le novel parts and va1"rangetnen-t;--coinbimttion's of parts wl-i-ielican he produced ii t low cost. e

The invention will he nut-heimen-y initlet'sttiod-lfmnr the following deseif-ipfion and elaiins; anti fronttlie drawings-,- in which latter:-

Fig; l is a diagrammatic representation 01'? the principle of opel'iat-io of emliodinients of my intention.

Fig. a side elevation of an einl'iocliment, of my invention.

is a (moss-section of a portion ot' Fig. is :r sicl'eelevzition of another e1nhotl i nentof y invention.

Fig. 5 a, side elevationof a further enibOC llIIIQD't of my invention Fig" 6 isa or I same, tgilien on the l ne oss-sec-tion of'aportion of the 6 -26 of Fig, 5.

Fig 7 is a/sid, elevation at i notlier enient of lily? invention, 7

81s a cross-seotmn of-a- 'oort-ion of the same, tzilzen oli the line 8 -8 of' Fig. 7. I F g. Dos-a side elevation 0t another enihotlgrnent of in invention.

Fl 1 l is wi h; elevation of" a still further en'ibodin'ient of my mv'en'tlo'm 11 is a cross-section of the san'ie,

ta-lien -oi tlie'li'ne 11-11 of Fig. 1U.

Ifigr 12 is a side elevation ot'enother embogl i 'inent of my invention; a'nd Flg. 131s nside elevation of a' further embodimentof my invention,

l have in Figs: 2; 4,5, '4', 9,10, 1-2 and 13 shown the operative;

parts in retracted or normal posit-ion 111 full lines and in printframe 1% p ti do e of thetypewiltep gs ls-neoessary to fines, so much of the illnstrate inyinvention being' shown in crosson, ztr dit Beingassninetl that the prlntseoti ing action 01' sheets b pan cont

foller inuously ztcce forces the ribbon upon the sheet eingv printed backed by the tyinthe principle; of operation of in. invention. for obtaining emted movement of the type-candor throughout the printing stroke,

an th t referring to; the lines" 21 2 1, it will be assumed represent the pair of articulatedtogether 24, tliat reppesents a stationary pivot forone end; of tlie tdggle,. aincl that the line wliixglialso represe ts the npper position of the links, represents the linear path of 1 3*, the 82 oat the other end of 1 $1327 with the 111i its" pivot 25 dsribethe-ate s'wirng iii. equal positions 31, 3'2, asntio ilntion i e let 141 in' te s of movement of the articulation 27throughout its movement.

Upon return of the articulation 27 to its normal position along'the path 26, the, reverse relation of speeds obtains, the initial portion of the return movement of the ar ticulation 27, and of the type-bar to which it is articulated, taking place-at primarily rapid speed, to clear the printing space adjacent to tympan or roller quicklyfbythe type-bar which hasjust'completd'its printing stroke for the reception of the'next',fol

lowing type-bar which isjto" printin' said printing space, when employing paths of type-bars which converge to a common printing point at the tympan roller. Referring now to Figs. 2 and '3, 'the frame of the typewriter is represented at"5.l, a tympan roller at 52 and aribbon at 5311 A type-carrier, shown as aslidable'typQ-bar 54, has a suitablenumber of typev55, 56 and 57 thereon. Suitable meansareprovided to raise and lower the tympan roller "and ribbon for placing their impression; portions opposite the type on'the type-barwhich is to print upon a suitable sheet of paper or duplicating sheets received about the roller between the roller and ribbon in any ordinary or usual manner. 1 l A key-lever 61 ispivoted on, an arc'u'ate cross-rod 62 to theframeof the'machine and has a key 63 thereon. The'type-bar is guided preferably in a 'right line path -toward and from the roller, as by beingreceived in guide-sl0ts64, 65, of arcuate guide-plates 66, 67, suitably secured to the frame, the paths of the collective type-bars conv'e'r'ging toward a common printing "poin't'at' the roller. p .'f""*-'-' The converging relations" of neighboring key-bars is indicated-in Fig. 3, i1'il'which three key-bars and associate'meclian'isms are shown, the middle one'of which is 'a; true end-view, and the side "ones' o'f which show parts of the sides of the type-bars'and keylevers presented towards said'middle typebar and key-lever. A toggle 68 comprises links 69', 70,*articulated together by an articulation 71. The link 70 has movement, in, aslot 72 in the plate 67. One endof the toggle ispivoted bymeans of a-pivot'73-to' a stationary part of the frame of the machine. The other end of the toggle has articulation- 74 with the type-bar. 'A link 75 has articulation with the articulation 71 at the knee of the toggle,

and articulation 76withthekey-leven- The links-of the toggle are normally located in extended relation so thatthe toggle extends nism connected thereto, all of which are -duplicatesiof each other.

lVhen the key-end of the key-lever is depressed, the knee of the toggle is also depressed, whereby the swinging end of the link 70 moves downwardly on-an are to correspond'with th'e arc 28 of the diagram in Fig. 1', thereby moving the type-bar in printing'direotion" with a continuously accelerating movement which is complemented by the inertia of motion of the type-bar for impartinga'q'uick, sharp printing blow to the ribbon and roller, and immediately returning to normal-position, as explained with reference to the principle of operation and diagram shown in Fig. 1.

- he swinging movement represents equal distances offthe knee of the toggle and results in movements of continuously increasing distances of the type-bar, for imparting the desired-momentum and force of stroke thereto," WVhen the type-bar is in striking position, it and the lengths of the toggle form a substantial triangle, as indicated in dotted lines in Fig. 2, representingthe'actuate'd or printing position of the elements. The key-leverisretracted to normal position by means of a spring 7 7 connected respectively to the key-lever and a stationary part of the frame, and the return of the keylever may be aided by a light spring 78, having connections at its respective ends with the link 70 and a stationary part of the frame. A cushion-pad 79 for cushioning the return of the lever maybe provided.

The initial portion of the return stroke ofthe type bar takes place with rapid niotiontoquickly clear the printing space adjacentto the roller 52 for the reception of the next type-bar actuated, as explained with reference-to the diagram in Fig. 1.

In the embodiment of my invention exemplified in Fig. 4-, similar parts are shown and designated by similar reference numerals with the'exponent prime (")Q In this exemplification the link 75 has articulation at 81 with the link 69 at a point intermediate of the ends of link 69', and said link 75 has the articulation 76 with the key-lever closer to the pivot of the key-lever than in the exemplification shown in Fig. 2, whereby the power exerted upon the toggle is increased and the stroke of the key-end of the keyleveris diminished.

Initial return of the type-bar is effected at a comparatively quick speed as explained with reference to the embodiment shown in Figs. 2and 3.

4 Referring now to Figs. 5 and 6,'a similar arrangement of type-bar... and toggle is lit! shown, the parts being indicated by similar reference numerals withwbhe exponent a. In this exen'ipl i tication the link 75* is extended and provided-with an articulation to a stationary partoct the machine. The fulcrum {32 of *tlmdrep-ilerer is placed in rear of the llinh 75 The articulation "4 6 between the l inkiff'and the lkey-lever is a sliding articulation for-med by the pivot pin thereof and av slot 86. "The articulation of said ii-n l: with'thetoggle is a sliding articulation tor-med by thepivot-pin .ogt saic articulation and a slot 87. These sliding articulations permit shitting movements of the key-lever and the toggle respectively len-g'hl-iwise of the link 7'5.

1" he principle of operation is the same as that explained with reterence to the diara-m of Fig. 1 and the embodiments of Figs. 2 to 1 inclusive.

Referring now to i-gs. 7 and 8, the parts of the machine, the type-bar, the toggle and the key-lever, are similar to the similar parts shown in Figs. 2-and 3, and indicated by similar reference numerals with the exponent b. In this exemp'lification the link 69 is provided with a slot 91, movasble length-wise of the pivot 73 lhe link 55 is extended by mea-ns'of an extension 92, which is provided with a cam 93 engaging a pin 94 stationaril-y positioned with relation to the frame. IYhen now the key-lever is depressed. the cam rides on the pin and swings the link 75 as a lever for moving the type-bar toward the roller with a conlinuou'sl accelerating movement which gathers momentum and force throughout the printing stroke of the type-bar the form of the cann'especially t-he final portion 90, heing such as to impart a finallquick impetus to the printing stroke of the type-lair.

Return of the ty 'ie-carrier is effected with an initial! rapid movement. all asexp lained with reference to the diagram of Fig: 1 and the emlmdiments shown in F 2 to 6 inclusive.

Referring: to Fig. 9, the frame. roller, rihhon, type-bar, guides therefor, and the keylerer, are similar to the similar parts shown in Figs. 2 and 3. and are designated by sim ilar reference numerals provided with the exponent c. In this cxemplilication there is a bell-crank lever 101 having a statiow ary pivot 102, and sliding articulation with the type-bar comprising a pin 103 and a slot 104. The bell-crank lever further has sliding arlirulatirm with the key-lever, comprising a pin 106 and a slot 107.

The bell-crank lever is so shaped that its arms extend at an acute angle to each other, the arm 10S thereof being longer than the arm 109, and extended in such directions and having such connections with the typebar and the key-lever respectively as to impart a continuously accelerating movement to the itypcrbar in its printing stroke for effecting a sharp blow of :the type upon (the rihhonfavhich is (the resultant ozf [the gathered impetus acquired by the type-bar in its .continiu ed positively increasingly accelerated printing stroke, the type-bar moving at highest'speed and with .gireatest force at the moment-it strikes the {ribbon and perfects its printing stroke.

Initial return increment is effected with a primarily'rapid IDOMQHlGlltto -.quicll:l,v l a the printing space at the tympan roller ,52 for the reception ofthe type-bar which is next actuated.

Referring to Figs. 10 and 11, the frame, roller, type-bar and hey-lever,

are similar to the similar parts shown in Fig. 2 and are indicated by similar ref- .eatence numerals nxivided with the exponent d. In this embodiment Of Any in- .ventiion there a lever 111. (which has a pivot 112 stationary ,on the dirame. It has a sliding articulation 113 with thetype- .bar and a sliding articulation 1141 with the lien-lever. :illhe articulation 113 compris an articulating pin on the typeshar and ,a slot 115 in itih-e lever. This ,zii'tioulaticn is preferably with a tail-piece 1-116 ot the typeihar. The 1161161 1:11 moms in a slot 117 in the plate 16?. The sliding ianticnlation 1.1 r

preferably comprises the articulating pin on the key-lever and a cam-slot 11b.

'l'Vhen :t'lie hey-'leuer [is .depressed, the pin off the [Sliding articulation 1-1 1 travels ,doavn the wall of the cam-Slot 118, the form of the slot dieing snchias to impart a continuously accelerating movement to the type-bar throughout printing stroke, and the final pontion 119 .of the ,cam .Oi Etlle Slot rimpant- 1 ta final additionally accelerated printing impulse to the type-carrier, the type-bar gatihening momentum and inertia of motion throughout such travel so that it has ac- .quired its greatest impetus and force at the moment the. type strikes the ribbon, tor offecting a clear impression.

Initial return movement is effected with a primarily rapid movement to quickly clear the printing space at the tympan roller 52 for the reception of the type-bar which is next actuated.

Referring to Fig. 12, the various parts are similar to the parts shown and described with reference to Figs. 10 and 11, the parts being designated by similar reference numerals provided with the exponent e. In the embodiment of my invention shown in Fig. 12, there is an articulation 121 between the key-lever and the lever 111 and there is a sliding articulation 122 between the lever 111 and the frame of the machine, that is to say, this articulation is a stationaril positioned articulation.

It comprises a stationary pivot-pin of the articulation on the frame and a cam-slot 12-3 in the lever 111, provided with a final portion 124, so related that upon depression of the key-lever a continuously accelerating stroke is imparted to the type-bar for accumulating momentum and intertia in the type-bar, and effecting increasing speed throughout the printing stroke of the type bar, and a final additional acceleration, so that the printing blow is struck when the type-bar is traveling at its greatest speed and with its greatest force. In this exemplification the sliding articulation 122 is located above the key-lever.

Initial return movement is effected with rapid movement as explained with reference to Figs. 10 and 11.

Referring to the embodiment of my invention, shown in Fig. 13, parts similar to those shown in Fig. 12 are shown, and provided with similar reference numerals having exponent f. In this embodiment the sliding articulation 122 is located below the keylever, the form of the cam-slot, especially the final portion 135 thereof, being such as to impart a continuously accelerating motion to the type-bar and a final blow in its printing stroke similar to the motion described with reference to Fig. 12, so that the typebar will have its maximum impetus and force applied thereto at the moment its type strikes the ribbon and completes its printing stroke.

Initial return movement is effected with rapid movement as explained with reference to Figs. 10, 11 and 12.

It will be noted that in my improved device the operating means between the key lever and the type-bar are located below the path of the type-bar, whereby compactness is obtained and that few parts of simple con struction are employed.

It will be further noted that by means of my improved device, providing for continuously accelerating movement in the printing stroke, and especially the final additional acceleration of the type-carrier in its printing stroke and the initial quick movement of the following type-carrier in its return stroke, the two movements may take place substantially simultaneously, thereby permitting speed in'the operation of the type-writer.

Having thus fully described my invention, what I claim as new, and desire to secureloy Letters Patent, is:

1. In a. typewriting machine, a frame, a plurality of key levers mounted on a common pivot, a plurality of reciprocating type blocks, a guide for said type blocks mounted above said key levers and substantially parallel thereto, an interconnecting lever on each of said key levers pivoted thereon having one end slidably connected to its type block to actuate the type block in accelerated and correspondingly decelerated movement as it reciprocates and means mounted on the frame engaging with a cam portion on said interconnecting lever for imparting the reciprocating movement to said interconnecting lever as it is carried vertically by its corresponding lever upon which it pivots.

2. In a-typewriting machine, the combination with a frame, a platen mounted thereon, a horizontally disposed type element adapted for longitudinal movement towards and away from the platen, a key lever pivoted to the frame to swing about a horizontal axis, a lever having its lower end pivoted to the frame and normally disposed at an oblique angle with respect to the horizontal, the upper end of the lever being directly operatively connected with the rear end of the type element, a laterally extending pin carried by the key lever intermediate its ends, which slidably and pivotally engage the lever at a point adjacent the pivotal connection between the lever and frame.

In testimony whereof, I have hereunto signed my name.

CHARLES U. CARPENTER. 

